Rotary pump



UNITED STATES TATET ron'.

CHARLES N. CLOV, OF PORT BYRON, NEW YORK.

ROTARY PUMP.

. Specification of Letters Patent No. 15,280, dated July 8, 1856.

To all whom t may con/cera.'

Be it known that I, CHAs. N. CLow, of Port Byron, in the count-y of Cayuga and State of New York, have invented a new and useful Improvement in Rotary Pumps; and I d o hereby declare that the following is a full and eXact description thereof, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a side elevation and Fig. 2 is a central longitudinal sectio-n.

Like letters designate like parts in both figures.

The nature of my invention consists in providing a suitable shaped case or shell, made of cast iron or other metal, in which revolve two cams or pistons, on the peripheries of which rides a roller, said roller forming the abutment of the pump; the cams are made to revolve by gearing on the outside of the case.

rIhe shape of the interior of t-he case will be seen by reference to Fig. 2, the outside being of any required form; in the case are two cams or pistons A, A, which are packed, by putting a ring of india rubber or other flexible material on their peripleries, which ring is wide enough to make a tight joint sidewise, and also rubs the case at the extremities of the cams; or, any other well known method of packing may be used, although the one spoken of is considered best.

The cams have smooth peripheries, and may be of any desired shape; they are set with the long diameter of one opposite the short diameter of the other, and are made to revolve toward each other by gear wheels B, B, on the outside of the case, and are placed at such a distance from each other, as to leave a small space between their peripheries at all points in their revolution; immediately over this space and resting on the peripheries of the cams is a roller C, which is turned true, so that it makes a water tight joint where it rests on them; as the cams rotate this roller moves longitudinally in the case, but at all times lies over the space between the cams; this will be more -readily understood by reference to Fig. 2,

where two positions of the cams and roller are shown, one being in dotted lines. The roller C, forms the abutment of the pump.

The operation of the pump is as follows: Power being' applied to the crank, the cams will rotate in the direct-ion of the arrows, and will produce a vacuum, and therefore raise the water through pipe D, and force it out at pipe E; i

The advantages derived from a pump so constructed are, that, it is cheaper from the fact that the case can be bored with but very little regard to the distance of the centers of the cams from each other, whereas in other pumps with two pistons very accurate work is required; constant use also improves the tightness of the joints of the abutment instead of wearing away as in other pumps,

and further, the packing can be ,turned around on the cams so as to present new wearing surfaces on the ends, and this without impairing the tightness of the abutment; there are no valves to clog, and anything that will enter the pipes can pass through the pump without injuring it.

I am aware that the cams A, A, have been heretofore used, and therefore I wish it distinctly understood that I do not claim them as new, but:

IV hat I claim as my invention, and desire to secure by Letters Patent is The roller C, or its equivalent, inserted in the manner and for the purpose described.

The above specification of my improved pump signed this 23d day of May 1856.

CHAS. N. GLOV.

l/Vitnesses:

F. S. MUNsoN, WM. HENDERSON. 

